test(actions): bare runner checkpoint discriminator

[ghost]

Purpose

Discriminate whether the current GitHub Actions pre-start failure occurs above action resolution.

Test

The workflow contains no uses: steps and executes only:

run: echo ok

Interpretation

• zero executed steps: failure is above workflow action selection;
• executed shell step: quota/global-runner hypotheses weaken and action-policy hypotheses regain weight.

Diagnostic only. No merge authorization.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
hook-generator	Ready	Preview	Aug 2, 2026 5:55am
hub	Ready	Preview	Aug 2, 2026 5:55am
platform-picker	Ready	Preview	Aug 2, 2026 5:55am

[cloudflare-workers-and-pages]

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	aegisomega	774fe50	Commit Preview URL Branch Preview URL	Aug 02 2026, 05:55 AM

[ghost]

Exact-head diagnostic result

Candidate: 774fe504c5a0ebb7740324de01e940e41328daf5

Workflow run: 30734944720

Job: 91461933881 (bare-run)

workflow uses:       NONE
shell steps declared: 1 (`run: echo ok`)
job conclusion:      failure
executed steps:      0
logs:                unavailable

Interpretation

The pre-start rejection reproduces without actions/*, github/*, or any third-party action. Therefore narrow selected-action filtering and github_owned_allowed=false do not explain the observed failure.

The failure locus is above action resolution and workflow step content. Remaining classes include account/repository Actions availability, billing or quota state, runner/platform admission, and broader policy controls.

bare_run_discriminator       FAILED PRE-START
workflow_content_causality   REJECTED
selected_actions_narrow      REJECTED
owned_action_filter          REJECTED
startup_failure_source       EXTERNAL / ABOVE ACTION RESOLUTION
quota                         LEADING, NOT VERIFIED
platform/account controls     NOT ELIMINATED

Diagnostic PR only. No merge authorization.